src/target/arm966e.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm966e.h"
  25
  26 #include "arm7_9_common.h"
  27 #include "register.h"
  28 #include "target.h"
  29 #include "armv4_5.h"
  30 #include "embeddedice.h"
  31 #include "log.h"
  32 #include "jtag.h"
  33 #include "arm_jtag.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #if 0
  39 #define _DEBUG_INSTRUCTION_EXECUTION_
  40 #endif
  41
  42 /* cli handling */
  43 int arm966e_register_commands(struct command_context_s *cmd_ctx);
  44
  45 /* forward declarations */
  46 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  47 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  48 int arm966e_quit(void);
  49
  50 target_type_t arm966e_target =
  51 {
  52         .name = "arm966e",
  53
  54         .poll = arm7_9_poll,
  55         .arch_state = armv4_5_arch_state,
  56
  57         .target_request_data = arm7_9_target_request_data,
  58
  59         .halt = arm7_9_halt,
  60         .resume = arm7_9_resume,
  61         .step = arm7_9_step,
  62
  63         .assert_reset = arm7_9_assert_reset,
  64         .deassert_reset = arm7_9_deassert_reset,
  65         .soft_reset_halt = arm7_9_soft_reset_halt,
  66
  67         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  68
  69         .read_memory = arm7_9_read_memory,
  70         .write_memory = arm7_9_write_memory,
  71         .bulk_write_memory = arm7_9_bulk_write_memory,
  72         .checksum_memory = arm7_9_checksum_memory,
  73
  74         .run_algorithm = armv4_5_run_algorithm,
  75
  76         .add_breakpoint = arm7_9_add_breakpoint,
  77         .remove_breakpoint = arm7_9_remove_breakpoint,
  78         .add_watchpoint = arm7_9_add_watchpoint,
  79         .remove_watchpoint = arm7_9_remove_watchpoint,
  80
  81         .register_commands = arm966e_register_commands,
  82         .target_command = arm966e_target_command,
  83         .init_target = arm966e_init_target,
  84         .examine = arm9tdmi_examine,
  85         .quit = arm966e_quit,
  86 };
  87
  88 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  89 {
  90         arm9tdmi_init_target(cmd_ctx, target);
  91
  92         return ERROR_OK;
  93 }
  94
  95 int arm966e_quit(void)
  96 {
  97
  98         return ERROR_OK;
  99 }
 100
 101 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, int chain_pos, char *variant)
 102 {
 103         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 104         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 105
 106         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 107
 108         arm9tdmi->arch_info = arm966e;
 109         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 110
 111         /* The ARM966E-S implements the ARMv5TE architecture which
 112          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 113          */
 114         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 115         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 116
 117         arm7_9->sw_bkpts_use_wp = 0;
 118         arm7_9->sw_bkpts_enabled = 1;
 119
 120         return ERROR_OK;
 121 }
 122
 123 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 124 {
 125         int chain_pos;
 126         char *variant = NULL;
 127         arm966e_common_t *arm966e = malloc(sizeof(arm966e_common_t));
 128         memset(arm966e, 0, sizeof(*arm966e));
 129
 130         if (argc < 4)
 131         {
 132                 LOG_ERROR("'target arm966e' requires at least one additional argument");
 133                 exit(-1);
 134         }
 135
 136         chain_pos = strtoul(args[3], NULL, 0);
 137
 138         if (argc >= 5)
 139                 variant = args[4];
 140
 141         LOG_DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 142
 143         arm966e_init_arch_info(target, arm966e, chain_pos, variant);
 144
 145         return ERROR_OK;
 146 }
 147
 148 int arm966e_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p, arm9tdmi_common_t **arm9tdmi_p, arm966e_common_t **arm966e_p)
 149 {
 150         armv4_5_common_t *armv4_5 = target->arch_info;
 151         arm7_9_common_t *arm7_9;
 152         arm9tdmi_common_t *arm9tdmi;
 153         arm966e_common_t *arm966e;
 154
 155         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 156         {
 157                 return -1;
 158         }
 159
 160         arm7_9 = armv4_5->arch_info;
 161         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 162         {
 163                 return -1;
 164         }
 165
 166         arm9tdmi = arm7_9->arch_info;
 167         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 168         {
 169                 return -1;
 170         }
 171
 172         arm966e = arm9tdmi->arch_info;
 173         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 174         {
 175                 return -1;
 176         }
 177
 178         *armv4_5_p = armv4_5;
 179         *arm7_9_p = arm7_9;
 180         *arm9tdmi_p = arm9tdmi;
 181         *arm966e_p = arm966e;
 182
 183         return ERROR_OK;
 184 }
 185
 186 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 187 {
 188         armv4_5_common_t *armv4_5 = target->arch_info;
 189         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 190         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 191         scan_field_t fields[3];
 192         u8 reg_addr_buf = reg_addr & 0x3f;
 193         u8 nr_w_buf = 0;
 194
 195         jtag_add_end_state(TAP_RTI);
 196         arm_jtag_scann(jtag_info, 0xf);
 197         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 198
 199         fields[0].device = jtag_info->chain_pos;
 200         fields[0].num_bits = 32;
 201         fields[0].out_value = NULL;
 202         fields[0].out_mask = NULL;
 203         fields[0].in_value = NULL;
 204         fields[0].in_check_value = NULL;
 205         fields[0].in_check_mask = NULL;
 206         fields[0].in_handler = NULL;
 207         fields[0].in_handler_priv = NULL;
 208
 209         fields[1].device = jtag_info->chain_pos;
 210         fields[1].num_bits = 6;
 211         fields[1].out_value = &reg_addr_buf;
 212         fields[1].out_mask = NULL;
 213         fields[1].in_value = NULL;
 214         fields[1].in_check_value = NULL;
 215         fields[1].in_check_mask = NULL;
 216         fields[1].in_handler = NULL;
 217         fields[1].in_handler_priv = NULL;
 218
 219         fields[2].device = jtag_info->chain_pos;
 220         fields[2].num_bits = 1;
 221         fields[2].out_value = &nr_w_buf;
 222         fields[2].out_mask = NULL;
 223         fields[2].in_value = NULL;
 224         fields[2].in_check_value = NULL;
 225         fields[2].in_check_mask = NULL;
 226         fields[2].in_handler = NULL;
 227         fields[2].in_handler_priv = NULL;
 228
 229         jtag_add_dr_scan(3, fields, -1);
 230
 231         fields[0].in_handler_priv = value;
 232         fields[0].in_handler = arm_jtag_buf_to_u32;
 233
 234         jtag_add_dr_scan(3, fields, -1);
 235
 236 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 237         jtag_execute_queue();
 238         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 239 #endif
 240
 241         return ERROR_OK;
 242 }
 243
 244 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 245 {
 246         armv4_5_common_t *armv4_5 = target->arch_info;
 247         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 248         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 249         scan_field_t fields[3];
 250         u8 reg_addr_buf = reg_addr & 0x3f;
 251         u8 nr_w_buf = 1;
 252         u8 value_buf[4];
 253
 254         buf_set_u32(value_buf, 0, 32, value);
 255
 256         jtag_add_end_state(TAP_RTI);
 257         arm_jtag_scann(jtag_info, 0xf);
 258         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 259
 260         fields[0].device = jtag_info->chain_pos;
 261         fields[0].num_bits = 32;
 262         fields[0].out_value = value_buf;
 263         fields[0].out_mask = NULL;
 264         fields[0].in_value = NULL;
 265         fields[0].in_check_value = NULL;
 266         fields[0].in_check_mask = NULL;
 267         fields[0].in_handler = NULL;
 268         fields[0].in_handler_priv = NULL;
 269
 270         fields[1].device = jtag_info->chain_pos;
 271         fields[1].num_bits = 6;
 272         fields[1].out_value = &reg_addr_buf;
 273         fields[1].out_mask = NULL;
 274         fields[1].in_value = NULL;
 275         fields[1].in_check_value = NULL;
 276         fields[1].in_check_mask = NULL;
 277         fields[1].in_handler = NULL;
 278         fields[1].in_handler_priv = NULL;
 279
 280         fields[2].device = jtag_info->chain_pos;
 281         fields[2].num_bits = 1;
 282         fields[2].out_value = &nr_w_buf;
 283         fields[2].out_mask = NULL;
 284         fields[2].in_value = NULL;
 285         fields[2].in_check_value = NULL;
 286         fields[2].in_check_mask = NULL;
 287         fields[2].in_handler = NULL;
 288         fields[2].in_handler_priv = NULL;
 289
 290         jtag_add_dr_scan(3, fields, -1);
 291
 292 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 293         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 294 #endif
 295
 296         return ERROR_OK;
 297 }
 298
 299 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 300 {
 301         int retval;
 302         target_t *target = get_current_target(cmd_ctx);
 303         armv4_5_common_t *armv4_5;
 304         arm7_9_common_t *arm7_9;
 305         arm9tdmi_common_t *arm9tdmi;
 306         arm966e_common_t *arm966e;
 307         arm_jtag_t *jtag_info;
 308
 309         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 310         {
 311                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 312                 return ERROR_OK;
 313         }
 314
 315         jtag_info = &arm7_9->jtag_info;
 316
 317         if (target->state != TARGET_HALTED)
 318         {
 319                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 320                 return ERROR_OK;
 321         }
 322
 323         /* one or more argument, access a single register (write if second argument is given */
 324         if (argc >= 1)
 325         {
 326                 int address = strtoul(args[0], NULL, 0);
 327
 328                 if (argc == 1)
 329                 {
 330                         u32 value;
 331                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 332                         {
 333                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 334                                 return ERROR_OK;
 335                         }
 336                         jtag_execute_queue();
 337
 338                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 339                 }
 340                 else if (argc == 2)
 341                 {
 342                         u32 value = strtoul(args[1], NULL, 0);
 343                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 344                         {
 345                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 346                                 return ERROR_OK;
 347                         }
 348                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 349                 }
 350         }
 351
 352         return ERROR_OK;
 353 }
 354
 355 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 356 {
 357         int retval;
 358         command_t *arm966e_cmd;
 359
 360         retval = arm9tdmi_register_commands(cmd_ctx);
 361         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 362         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 363
 364         return ERROR_OK;
 365 }